Electric regulation



J. L. CREVELING.

ELECTRIC REGULATION.

APPLICATION FILED MAR. 8. 1912.

1,412,339. Patented p 11, 1922;

lllllllwlml I WITNESSES INVENTOR UNITED STATES PATENT OFFICE. I

JOHN L. CREVELING, OF YORK, N. Y., ASSIGNOR TO SAFETY CAR HEATING AND LIGHTING COMPANY, A CORPORATION OF NEW JERSEY.

ELECTRIC I REGULATION.

To all whom it may concern Be it known that I, JOHN L. CREVELING, a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Electric Regulations, as set forth in the annexed specification and drawing forming a part thereof. Y

My invention pertains to that class of electric regulation wherein it is desired to regulate a dynamo or generator in a predetermined manner and has for one of its particular objects to provide means whereby a generator driven .at variable speeds may be automatically governed to properly charge a storage battery and operate lamps or other translating devices.

The drawing is a diagrammatic representation of one type of system embodying the essentials of my inventlon.

In the drawing, 1 represents a dynamo or generator provided with usual field coil 2 having in series therewith a regulating element, in this instance, indicated as .a' carbon pile 3. The movable end member of the carbon pile is preferably attached, as by the rocking joint 4, to the lever or yoke 5 having one extremity hinged, as indicated at 6, to one limb 7 of a bell crank lever pivoted at 8 and provided with the limb 9 carrying at its extremity a core of magnetic material 10- surrounded by the solenoid 11 in such manner that excitation of the said solenoid tends to draw the core 10 downwardly while too sudden motion of the core may be arrested b any suitable dash-pot indicated at 12. he opposite extremity of the yoke 5 is provided with a slot 13 engaging the pin 14; carried by the limb 15 of'a bell crank lever pivoted at 16 and provided with the limb 17 carrying at its extremity a core 18 of iron or othermagnetic material surrounded by the solenoid 19 in such manner that excitation of the said solenoid tends to lift the core 18, while too sudden movement may be arrested as desired by use of a suitable dash-pot indicated at 20. 21 is an adjustable spring normally tending to swing the lever 7 in a counter-clockwise direction and cause the yoke 5 to compress the pile 3. 22 is an adjustable spring tending to swing the lever 15 in a clockwise direction so as to\ compress the pile 3. 23 is an adjustable stop for limiting the revolution that may be caused by the spring 21, and 2a is an ad- Specification of Letters Patent.

Application filed March 8, 1912.

Patented'Apr. 11, 1922.

Serial No. 682,468.

justable stop limiting the revolution that may be caused by the spring 22. 25 represents the positive lead of the generator which 1s carried tothe positive side of the storage battery 26 and lamps or other translating devices indicated at 27 The negative termlnals of the translating devices and storage battery are connected with the wire 28 which 1s led through the coarse series solenoid 11 to one side of the automatic switch 29 havlng its opposite terminal connected with the negative side of the generator as by the wire 30. The switch 29 is preferably of the automatic variety adapted to close the circuit bemere presence of one of said switches is indicated conventionally. The solenoid 19 is a voltage solenoid of fine wire placed in shunt across the storage battery and generator circuit.

An operation of my invention is substan tially as follows: I

.If the generator be started, current will flow through the field winding 2 and resistance 3, and the generator will build up in a well known manner. If the speed be raised until the voltage of the generator is very shghtly in excess of that of the storage battery, the main switch 29 will close and current will flow from the generator through lead 25, storage battery 26 or translating devices 27, wire 28, solenoid 11, switch 29 and wire 30 to the generator, and I so adjust the spring 21 that when a desired current output from the generator is flowing through the coil 11, any appreciable increase above this amount will cause the core 10 to be drawn downwardly against the action of spring 21 and thus swing the lever 5 in such direction as to decrease the pressure upon the carbon pile 3 and increase the resistance controlling the generator field in such manner that this maximum desired current will not be exceeded upon speed increases of the generator. I now so adjust the spring 22 that, when a desired maximum voltage across the generator and battery is reached;

that is, forexam'ple, the desired maximum voltage to have impressed upon the battery, the solenoid 19 in shunt across the generator and battery circuit will raise the core 18 and lift the lever 17 and swingthe lever 15 against the action of spring 22 so as to move the lever and increase the resistance 3 and desired maximum voltage, the voltage coil 19 will assume control of the generator and the same will be voltage regulated and the current will be less than'that required to operate the current regulating mechanism, and as the battery is charged and its voltage rises further, the charging current will gradually taper off.

I do not wish inany way to limit myself to the details of construction nor. to the exact mode of operation herein outlined to illustrate one embodiment of myv invention, for it will be obvious that wide departure in the way of details may be made without departing from the spirit and scope of my invention, which' is as set forth in the following claims a 1. The combination with a generator, a

' pressure resistance therefor, a lever for controlling said resistance, a bell crankconnected to one end of said lever, a current responsive coil for actuating said bell crank,

, a bell crank connected to the other j'end of the lever, and a voltage responsive coil to actuate said last named bell crank.

2. Regulating. means for a car lighting generator including a variable resistance, a

ever for operating said resistance and a plurality of electro-magneticwindings havmg armatures attached to said lever, said windings and armatures having means whereby one winding may operate said lever independently of the other and whereby said operation is prevented from affecting the mechanical and electrical efficiency of the other winding and armature.

' 3. An electric regulator comprising among its elements an equalizing bar, a stop for limiting the movement ofeach end thereof,-

tension means for said'bar, and a solenoid associated with each end of saidbar, for moving the corresponding end of said bar in opposition to said tension device.

4. Means for" transmitting movement due to variations in the energization of two solevnoids, said means comprising a movableplunger for each solenoid, a member con nected at opposite-ends to said plungers, a second member connected to an intermediate portion of the 'first member whereby the movement of the second member represents the combined independent movements of said plungersand means whereby when one plunger has moved a predetermined distance out of its solenoid, the opposite plunger when operated is prevented from moving and substantially the middle point of said bar whereby the movement of either end of said bar about the other end as a pivot, is communicated to the end of said variable pressure rheostat, the movement of said bar during one period of operation being due to the energization of said current coil whereby the source is regulated for substantially constant current output, the movement of said bar during a subsequent period being due to an'increased energization of said voltage coil and to a correspondingly decreased energization of said current coil due to reduction or taperin of the current output of said source, sai bar swinging about said middle point during the tapering of the current output, whereby the electrical conditions of the system are undisturbed ver, a spring acting on said lever and a stop to restrain the action of said spring, a second lever connected to said link and a voltage controlled means governing said latter lever, a spring acting on said second lever and a stop to restrain the action of said 'nections between one end of said rheostat end of said link, an electromagnet governing said latter lever, and means to hold one of said levers stationary.

9. The combination with a generator and a circuit, of a'regulator for the generator, a floating member for actuating the regulator, means for controlling the float-v ing member, and additional controlling means adapted to supersede the first-,

named controlling means-without altering the relation of the first-named controlling means to said circuit.

10. The combination with a generator and a circuit, of a battery to be charged by the generator, a regulator for the generator, a floating member for actuating the regulator, means for controlling the floating member, and additional means for superseding the operation of the first-named controlling means in the'control of said member with out altering the relation of said first-named controlling means to the circuit.

11. The combination with a generator and current actuated means for controlling the floating member, and voltage actuated means for superseding the said current actuated means in the control of said member without altering the relation of the current actuated means to the circuit.

12; The combination with a generator and a circuit, of a storage battery to be charged by the generator, a regulator, a floating member for actuating the regulator, current actuated means for controlling the floating member, and voltage actuated means for superseding the current actuated means in the control of said member Without altering the relation of the current actuated means to the circuit.

JOHN L. CREVELING.

Witnesses ANNA M; WALL, M. Hnnsxovrrz. 

